کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398056 | 1505880 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Energy transfer from Gd3+ to Sm3+ and luminescence characteristics of CaO-Gd2O3-SiO2-B2O3 scintillating glasses
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, density, optical, photoluminescence and x-ray scintillation properties of calcium gadolinium silicoborate glass (CaO:Gd2O3:SiO2:B2O3) have been investigated. Glasses were prepared by the conventional melt quenching technique. The results show that the density of glass increased with increasing of Sm2O3. The optical spectra of glass shows eleven discrete absorption bands at 360, 373, 403, 475, 944, 1077, 1225, 1368, 1468, 1520 and 1586Â nm which are due to the transitions of 6H5/2 to 4D3/2, 6P7/2, 6P3/2, 4I11/2, 6F11/2, 6F9/2, 6F7/2, 6F5/2, 6F3/2, 6H15/2 and 6F1/2, respectively. The emission spectra were observed and assigned to 312, 563, 600, 646 and 703Â nm by excitation at 275Â nm. The emission intensity of Sm3+ increased with increasing of Sm2O3 concentration until 0.25Â mol%, while decay time decrease with increasing of Sm2O3 content. For results of the radioluminescence (RL), they perform four emission peaks with the strongest emission at 598Â nm. Glass doped with 0.35Â mol% Sm2O3 show the highest RL emission. The integral scintillation efficiency of 0.35Â mol% Sm2O3 doped glass was determined as 25% of commercial BGO scintillator crystal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 181, January 2017, Pages 382-386
Journal: Journal of Luminescence - Volume 181, January 2017, Pages 382-386
نویسندگان
N. Wantana, S. Kaewjaeng, S. Kothan, H.J. Kim, J. Kaewkhao,